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Microbial diversity of the Arabian Sea in the Oxygen minimum zones by metagenomics approach

View ORCID ProfileMandar S. Paingankar, Kedar Ahire, Pawan Mishra, Shriram Rajpathak, View ORCID ProfileDeepti D. Deobagkar
doi: https://doi.org/10.1101/731828
Mandar S. Paingankar
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune - 411 007, India
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Kedar Ahire
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune - 411 007, India
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Pawan Mishra
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune - 411 007, India
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Shriram Rajpathak
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune - 411 007, India
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Deepti D. Deobagkar
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune - 411 007, India
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  • ORCID record for Deepti D. Deobagkar
  • For correspondence: deepti.deobagkar@gmail.com
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ABSTRACT

Large oxygen depleted areas known as oxygen minimum zones (OMZ) have been observed in the Arabian Sea and recent reports indicate that these areas are expanding at an alarming rate. In marine waters, oxygen depletion may also be related to global warming and the temperature rise, acidification and deoxygenation can lead to major consequences wherein the plants, fish and other biota will struggle to survive in the ecosystem.

The current study has identified the microbial community structure using NGS based metagenomics analysis in the water samples collected at different depth from the oxygen depleted and non-OMZ areas of Arabian Sea. Environmental variables such as depth, site of collection and oxygen concentration appeared to influence the species richness and evenness among microbial communities in these locations. Our observations clearly indicate that population dynamics of microbes consisting of nitrate reducers accompanied by sulphate reducers and sulphur oxidizers participate in the interconnected geochemical cycles of the OMZ areas. In addition to providing baseline data related to the diversity and microbial community dynamics in oxygen-depleted water in the OMZ; such analysis can provide insight into processes regulating productivity and ecological community structure of the ocean.

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Posted August 10, 2019.
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Microbial diversity of the Arabian Sea in the Oxygen minimum zones by metagenomics approach
Mandar S. Paingankar, Kedar Ahire, Pawan Mishra, Shriram Rajpathak, Deepti D. Deobagkar
bioRxiv 731828; doi: https://doi.org/10.1101/731828
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Microbial diversity of the Arabian Sea in the Oxygen minimum zones by metagenomics approach
Mandar S. Paingankar, Kedar Ahire, Pawan Mishra, Shriram Rajpathak, Deepti D. Deobagkar
bioRxiv 731828; doi: https://doi.org/10.1101/731828

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